21152692 has 24 divisors (see below), whose sum is σ = 42759360. Its totient is φ = 9048960.

The previous prime is 21152683. The next prime is 21152713. The reversal of 21152692 is 29625112.

It is a self number, because there is not a number n which added to its sum of digits gives 21152692.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13392 + ... + 14887.

It is an arithmetic number, because the mean of its divisors is an integer number (1781640).

Almost surely, 2^21152692 is an apocalyptic number.

21152692 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21152692 is an abundant number, since it is smaller than the sum of its proper divisors (21606668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21152692 is a wasteful number, since it uses less digits than its factorization.

21152692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28311 (or 28309 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 21152692 is about 4599.2055835764. The cubic root of 21152692 is about 276.5594791311.

The spelling of 21152692 in words is "twenty-one million, one hundred fifty-two thousand, six hundred ninety-two".